There's a interesting recent paper, also cited by these folks, about errors in gene expression data. Spreadsheets (or at least Excel) are a major culprit, interpreting gene SEP15 as September 15, for example. This is dangerous when it happens in only part of the data, like some columns.

Gene name errors are widespread in the scientific literature

Genome Biology 2016 17:177

https://doi.org/10.1186/s13059-016-1044-7 (Open Access)